How to record CSS coverage in your browser. After that, export the data as JSON and select or drop the file here. Or .

This CSS Coverage viewer makes a visualization of used and unused pieces of your CSS. It uses the JSON exported by DevTools (in Playwright, Edge, Puppeteer or Chrome) to make a single visualization.

  • Combine output multiple Coverage JSON files into a single overview
  • Mark each line as covered or not covered
  • Prettify CSS for easy inspection